/*
 * Copyright (c) 2008, University of Aarhus.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - Neither the name of the University of Aarhus nor the names
 *   of its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author: Morten Tranberg Hansen <mth@cs.au.dk>
 * @date:   October 16 2008	
 * 
 */

package dk.sensobyg.base;

import java.util.List;
import java.util.LinkedList;

import org.apache.log4j.Logger;

public class SimpleDatabase implements Database {

	private transient static Logger log = Logger.getLogger("dk.sensobyg.base.MySQLDatabase");
	private static final int MAX_SIZE = 1000;
	
	private LinkedList<SensorData> data;
	
	public SimpleDatabase() {
		data = new LinkedList<SensorData>();
	}
	
	public void connect() {
		log.debug("Connecting to database.");
		
	}
	
	public void disconnect() {
		log.debug("Closing connection to database.");
	}

	
	public List<SensorData> query(String query) {
		log.debug("Querying database with query: " + query);
		
		List<SensorData> result = new LinkedList<SensorData>();
		
		if(!data.isEmpty()) { 
			try {
				long sensorid = Long.parseLong(query);
				for(SensorData d : data) {
					if(d.getSensorId()==sensorid) {
						result.add(d);
						return result;
					}
				}
			} catch(NumberFormatException e) {}
		}
		return result;
	}
	
	public void add(SensorData d) {
		data.add(d);
		while(data.size()>MAX_SIZE) {
			data.poll();
		}
		//log.debug("Adding data: " + d);
	}
		
}
